Category:WP5

Overview

DE4A WP5, Common Component Design & Development, designs and develops new common software components, required for the Pilot implementations and aligned with the other technical work packages.

Objectives include:

1. Integration and consolidation of all architectural, semantic and pilot-domain features to distil common components in order to build a fully operational environment for each piloting use case;
2. Specification of product commonalities and technical design of component interfaces fully aligned with the European Interoperability Framework and re-usable beyond the project;
3. Development of high quality and optimized common services and components;
4. Development of innovative open common components and products based on Blockchain;
5. Support to pilot and national deployments with component documentation, as well as making available the common components as new building blocks in a public repository.

Common specifications

Third party specifications and components

The DE4A project is based on some specifications and components that allow building new software with some inherited capabilities such as security, reliability, integrity and scalability.

Some of the main technologies involved are described here.

Description of common software interfaces

This page contains a description of the different software interfaces created for the DE4A project. The information provided can be used as a reference on the development and integration process to each pilot.

DE4A Logs and error messages

In order to standardise the errors and logs handled by each component, some conventions have been taken, as log patterns, error codes definition or messages content.

The information on this page should be used by each partner who develops a DE4A component, also it should be maintained to have a proper messages reference and be aware which information will include.

Apart from the usual reasons of the logging and error handling, in the DE4A project, there are 3 main bullet points on which the definition of messages is based:

• Kafka tracking: messages sent to the Kafka server which can be previewed at: https://de4a-dev-pt.egovlab.eu/#!detail
• Metrics logs: messages marked with a special tag inside the common log file or logged on a separated file, which will be used to analyze and raise some metrics about each system
• Error convention: standardise the error messages and codes

Common Components

DE4A Connector

DE4A SSI Authority Agent

DE4A SSI Edge Agent

Testing infrastructure

DE4A Playground

DE4A Playground joining stages for the first iteration